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<DIV dir=ltr align=left><SPAN class=673331918-20102009><FONT
face="Comic Sans MS" color=#0000ff>Hi Kris-</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=673331918-20102009><FONT
face="Comic Sans MS" color=#0000ff></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=673331918-20102009><FONT
face="Comic Sans MS" color=#0000ff>You wouldn't by any chance have opened these
geotiffs in ERDAS Imagine have you? Are there .aux or .rrd files
associated with these images?</FONT></SPAN></DIV>
<DIV><FONT face="Comic Sans MS" color=#0000ff></FONT> </DIV>
<DIV><SPAN class=673331918-20102009><FONT face="Comic Sans MS"
color=#0000ff>Thanks,</FONT></SPAN></DIV>
<DIV><SPAN class=673331918-20102009><FONT face="Comic Sans MS"
color=#0000ff>Amanda</FONT></SPAN></DIV><!-- Converted from text/rtf format -->
<P><B><SPAN lang=en-us><FONT face="Kristen ITC" color=#006291 size=2>Amanda M.
Henneke</FONT></SPAN></B><SPAN lang=en-us></SPAN> <BR></P>
<P align=center><SPAN lang=en-us><FONT face="Comic Sans MS" color=#008000
size=1>When One tugs at a single thing in Nature, he finds it attached to the
rest of the world. -John Muir</FONT></SPAN></P>
<P align=center><SPAN lang=en-us><FONT face="Comic Sans MS" color=#008000
size=1> Please consider the environment before printing this
e-mail.</FONT></SPAN></P>
<DIV> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> gdal-dev-bounces@lists.osgeo.org
[mailto:gdal-dev-bounces@lists.osgeo.org] <B>On Behalf Of </B>Kris
Pribadi<BR><B>Sent:</B> Tuesday, October 20, 2009 1:19 PM<BR><B>To:</B>
gdal-dev@lists.osgeo.org<BR><B>Subject:</B> [gdal-dev] ECW projection data using
Dataset.GetProjectionRef()<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal>Hi:<o:p></o:p></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d">I am a new GDAL user using
C#.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d"><o:p> </o:p></SPAN></P>
<P class=MsoNormal>I am using C# implementation of GDAL from FW_Tools. I am
trying to write a <SPAN style="COLOR: #1f497d">C</SPAN># program similar to
gdalinfo to extract the metadata from raster files. It is working fine with
GeoTiff files, but having problem reading ECW metadata file. The spatial
projection “<SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">_projectionWKT”</SPAN> info
returns “null”. However, when I use gdalinfo, it prints out the ECW file
coordinate system as WGS_84, which is correct. Does gdalinfo assume “WGS_84” if
GetProjectionRef() is null? How does it get the projection info from ECW file?
<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>I appreciate any help or suggestion<SPAN
style="COLOR: #1f497d">s</SPAN>.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Thanks<o:p></o:p></P>
<P class=MsoNormal>Kris<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">This is the fields
definition:<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"> OSGeo.GDAL.<SPAN
style="COLOR: #2b91af">Dataset</SPAN> _ds;<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: #2b91af">SpatialReference</SPAN>
_srs;<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: #2b91af">SpatialProjectionInfo</SPAN>
_projectionInfo;<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">This is my
program:<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
OSGeo.GDAL.<SPAN style="COLOR: #2b91af">Gdal</SPAN>.AllRegister(); <SPAN
style="COLOR: green">//Register drivers.<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
OSGeo.OGR.<SPAN
style="COLOR: #2b91af">Ogr</SPAN>.RegisterAll();<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
_ds = OSGeo.GDAL.<SPAN style="COLOR: #2b91af">Gdal</SPAN>.Open(Filename,
OSGeo.GDAL.<SPAN style="COLOR: #2b91af">Access</SPAN>.GA_ReadOnly); <SPAN
style="COLOR: green">//Open dataset from files<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: blue">if</SPAN> (_ds == <SPAN
style="COLOR: blue">null</SPAN>)<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
{<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: blue">throw</SPAN> <SPAN style="COLOR: blue">new</SPAN>
<SPAN style="COLOR: #2b91af">Exception</SPAN>(<SPAN style="COLOR: #a31515">"The
files could not be loaded"</SPAN>);<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
}<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: green">//TODO May fail if wrong file
type?<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
_ds.GetGeoTransform(_dbGeoTrans);<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: green">//TODO projectionWKT may be null if no info from the
file.<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: 'Courier New'">
//THIS RETURNS NULL FOR “ECW” FILES<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
_projectionWKT = _ds.GetProjectionRef();<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: #2b91af">Console</SPAN>.WriteLine(<SPAN
style="COLOR: #a31515">"Projection WKT: "</SPAN> +
_projectionWKT);<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: green">//Get Spatial Information
<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
_projectionInfo = <SPAN style="COLOR: blue">new</SPAN> <SPAN
style="COLOR: #2b91af">SpatialProjectionInfo</SPAN>(projectionWKT);
<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: #1f497d">bool </SPAN>_IsGeopgraphic =
_projectionInfo.IsGeographic;<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
<SPAN style="COLOR: #1f497d">bool </SPAN>_IsProjected =
_projectionInfo.IsProjected;<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
_srs = _projectionInfo.SpatialReference;<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><o:p> </o:p></P></DIV></BODY></HTML>